How far have you gotten attempting to compile GDAL?
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BuckFilledPlatypusJul 25 '12 at 18:21

Despite the assurances above, I've yet to see any explanation on how to add SID files into QGIS 8.0 on Ubuntu 12.04. If anyone has more precise information I'd also be interested to know. I've also posed a similar question in Ubuntu Forums at ubuntuforums.org/showthread.php?t=1997284 2 months, and as yet not a single response...
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user9327Aug 4 '12 at 17:08

Those explanations do explain how to get ECW support but now how to get SID support. I've also tried manually building gdal with mrsid without any luck and have yet to find any post anywhere where anyone has done so.
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user17218Apr 16 '13 at 23:24